<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgpu - dynamic cube reflection</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="example.css">
		<style>
			body {
				touch-action: none;
			}
		</style>
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org/" target="_blank" rel="noopener" class="logo-link"></a>

			<div class="title-wrapper">
				<a href="https://threejs.org/" target="_blank" rel="noopener">three.js</a><span>Dynamic Cube Reflections</span>
			</div>

			<small>
				Realtime reflections rendered with a cube camera.
			</small>
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.webgpu.js",
					"three/webgpu": "../build/three.webgpu.js",
					"three/tsl": "../build/three.tsl.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three/webgpu';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { HDRCubeTextureLoader } from 'three/addons/loaders/HDRCubeTextureLoader.js';
			import { Inspector } from 'three/addons/inspector/Inspector.js';

			let camera, scene, renderer;
			let cube, sphere, torus, material;

			let cubeCamera, cubeRenderTarget;

			let controls;

			init();

			async function init() {

				camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.z = 75;

				scene = new THREE.Scene();

				const uvTexture = new THREE.TextureLoader().load( './textures/uv_grid_opengl.jpg' );

				const hdrUrls = [ 'px.hdr', 'nx.hdr', 'py.hdr', 'ny.hdr', 'pz.hdr', 'nz.hdr' ];
				const texture = await new HDRCubeTextureLoader()
					.setPath( './textures/cube/pisaHDR/' )
					.loadAsync( hdrUrls );

				texture.name = 'pisaHDR';
				texture.minFilter = THREE.LinearMipmapLinearFilter;
				texture.magFilter = THREE.LinearFilter;

				scene.background = texture;
				scene.environment = texture;

				//

				cubeRenderTarget = new THREE.WebGLCubeRenderTarget( 256 );
				cubeRenderTarget.texture.type = THREE.HalfFloatType;
				cubeRenderTarget.texture.minFilter = THREE.LinearMipmapLinearFilter;
				cubeRenderTarget.texture.magFilter = THREE.LinearFilter;
				cubeRenderTarget.texture.generateMipmaps = true;

				cubeCamera = new THREE.CubeCamera( 1, 1000, cubeRenderTarget );

				//

				material = new THREE.MeshStandardNodeMaterial( {
					envMap: cubeRenderTarget.texture,
					roughness: 0.05,
					metalness: 1
				} );

				sphere = new THREE.Mesh( new THREE.IcosahedronGeometry( 15, 8 ), material );
				scene.add( sphere );

				const material1 = new THREE.MeshStandardNodeMaterial( {
					map: uvTexture,
					roughness: 0.1,
					metalness: 0,
				} );

				const material2 = new THREE.MeshStandardNodeMaterial( {
					map: uvTexture,
					roughness: 0.1,
					metalness: 0,
					envMap: texture,
				} );

				cube = new THREE.Mesh( new THREE.BoxGeometry( 15, 15, 15 ), material1 );
				scene.add( cube );

				torus = new THREE.Mesh( new THREE.TorusKnotGeometry( 8, 3, 128, 16 ), material2 );
				scene.add( torus );

				//

				renderer = new THREE.WebGPURenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animation );
				renderer.toneMapping = THREE.ACESFilmicToneMapping;
				renderer.inspector = new Inspector();
				document.body.appendChild( renderer.domElement );

				window.addEventListener( 'resize', onWindowResized );

				controls = new OrbitControls( camera, renderer.domElement );
				controls.autoRotate = true;

				const gui = renderer.inspector.createParameters( 'Settings' );
				gui.add( material, 'roughness', 0, 1 );
				gui.add( material, 'metalness', 0, 1 );
				gui.add( renderer, 'toneMappingExposure', 0, 2 ).name( 'exposure' );
				gui.add( scene, 'environmentIntensity', 0, 1 );
				gui.add( material2, 'envMapIntensity', 0, 1 );

			}

			function onWindowResized() {

				renderer.setSize( window.innerWidth, window.innerHeight );

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

			}

			function animation( msTime ) {

				const time = msTime / 1000;

				cube.position.x = Math.cos( time ) * 30;
				cube.position.y = Math.sin( time ) * 30;
				cube.position.z = Math.sin( time ) * 30;

				cube.rotation.x += 0.02;
				cube.rotation.y += 0.03;

				torus.position.x = Math.cos( time + 10 ) * 30;
				torus.position.y = Math.sin( time + 10 ) * 30;
				torus.position.z = Math.sin( time + 10 ) * 30;

				torus.rotation.x += 0.02;
				torus.rotation.y += 0.03;

				material.visible = false;

				cubeCamera.update( renderer, scene );

				material.visible = true;

				controls.update();

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>
